reed canary grass

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A tall rhizomatous perennial grass (Phalaris arundinacea) of wetland habitats in northern temperate regions, often forming dense stands.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun perennial grass of marshy meadows and ditches having broad leaves; Europe and North America